Heat, light, and power system



April 5, 1932. s. E. TEST HEAT, LIGHT, AND POWER SYSTEM Filed Oct. 29, 1928 IN VEN TOR.

.SK/L fs E. 721:7:

l ATToRNEx/s.`

Patented Apr. 5, 1932 UNITED STATES SKILES E. TEST, OF INDIANAPOLIS, INDIANA HEAT, LIGHT, ANI) POWER SYSTEM ApplicationV led October 29, 1928. Serial No. 315,904.

This invention relates to a combination power, lighting and heating system.

The chief object of the invention is to arrange a system which can economically compete with central station supply for light, power and heat.

The chief feature of the invention consists in a unitary combination heat, light and power plant or system including an electric generator and a prime mover, preferably in the form of a Diesel engine. In practice this system has demonstrated an efficiency of approximately 3313% more per pound of fuel han heretofore obtainable in standard pracice.

Another feature of the invention consists in the arrangement of the lighting load connection such that most eilicient operation of the Diesel can be obtained at all times under substantially all loads.

The full nature of the invention will be understood from the accompanying drawings and the following description and claim:

In the drawings Fig. 1 is a diagrammatic view of the system. Fig. 2 is a comparison load and efficiency curve chart for Diesel and internal combustion engines. Fig. 3 is a detail and plan of a switch arrangement.

In the drawings 10 indicates a suitable supply tank containing fuel for a suitable prime mover 11 connected to a suitable generator of electric energy 12. 13 indicates a hot Water heater for hot Water for consumption and or heating purposes, particularly the latter. All of the foregoing are old in the art, and the present invention consists in the connections therebetween for economically utilizing the same.

The fuel supply preferably is oil, which may be crude oil supplied by line 14 or may be a filtered crank case oil supplied by line 15. The latter is available and relatively inexpensive and preferably is utilized in installations Where the system is employed in garages as has been the case with one embodiment of this invention. Line 16 con* nects to tank 10, by branch 17 controlled by valve 18, the prime mover which is preferably a Diesel engine since it is very efficient,

requires but little attention and can be obtained commercially in suitable sizes.

The Diesel engine 11 is water `jacketed as at 19, and the exhaust 2O is also Water jacketed as at 21. A supply line 22 controlled by valve 23 supplies cool water to the water jacket 19 and the discharge 24 therefrom connects by line 25 to a hot water supply reservoir tank 26 which supplies, by suitable lines, risers, or headers 27, radiators and faucets and the like for heat and consumption purposes respectively. `The surplus orV return is returned by line 28 to the system and line 28 includes a pump 29 which by line 30 is connected to supply line 22 of the waterV jacket. Pump 29 may be directly connected to Diesel engine 11 or electrically to an electrical generator driven thereby.

A branch 31 of the pump pressure supply line controlled by valve 32 supplies cool water" tothe water jacket 21 about the exhaust 20 of the engine and the discharge therefrom controlled by valve 34 is connected byline 35 to the discharge 24 and hot water reservoir supply line 25 by the T-itting 36. f

The Diesel engine is mechanically and preferably directly connected as at 37 to the generator 12 and drives the same to supply electric energy suitably for power andlight purposes to the lines 38.

An auxiliary hot water heater system includes an intake 4() connected by a T-iitting 41 to the pump pressure supply line 30 and the valve 42 controls the supply of cool water to the water heater 13, the hot water leaving by line 43 connected to line 25 by T-itting 44, said discharge being controlled by valve 45. The heat for heating the Water passing therethrough is obtained by the use of fuel such as oil supplied by line 46, the same being an eX- tension of thetank supply line 16 and said line 46 being controlled by valve 47. Preferably a blower 48 suitably driven by the electric generator 12 as by a belt or mechanical connection `49 is also employed. vidual motor for the blower may be employed which however would be connected to the lines 38.

In hot weather `no hot water is required for heating and during the summer months An indi- Y the load upon the generator and therefore upon the engine is relatively light, so that the water jacketing circulation for the engine only is approximately suiiicient to supply hot water for consumption purposes. In cooler weather the lighting load increases, the load upon, the Diesel engine increases, the heat generated thereby increases andthe exhaust pipe hot water heater 21 is then cut in to the system and helps supply heat to the hot water reservoir. If desired; instead vof-havingthe two hot water jackets connected in parallel, they may be connected in series as bythe pipe 50 including valve 51 Vand valve 52 in line3l..A and valve 53 in line 24. Closing valves 52" andf53 and l.opening valve-51 causes` the hot water from one-water jacket to pass -in series to the'other water Aj acket,opening said valves puts the twojackets inparallel, and closing `valves 452A and? 34-A eliminate the exhaust `pipe water jacket heater. Selective connection andi control is thereby possible..-

During cold.we'atherfwhen-the heating systenir is operatingunder. a'heavyk load,.theheat 26 generated-by* thetwonvater jackets is not sufiicient `for ,heatingy and consumption purposes andi thenthe'water heater 1'3 .is placed in operation' f and serves to .help fcarry, the load. Supply line -(iQ-controlled by valve 61 supplies icoldv water. to r'thezsystern to -replenish anyl loss occasioned by leakage or iconsumption.

'Ihepresent arrangement permits the employment of a unit power plant with anl economyfbetterthanwthatobtainable from a central. station. The-.wasteheat inthe Diesel en- :chart showing the efficiency operating characteristicsof aDiesel engine and an internal combustion engineythefull line showing. `the Diesel curve -andfthe-brokenline-showing the internalcombustion :engine curve.: .From

-thisehartit is apparent that thelinternalf com- 'bustionzengine'has betterfoperating eficiency upto one-quarter loads, 'that is, `at v`lower -percentages ot' lulli loadi greater operating eiliciency is obtainable than :from-the Diesel en- -gine underlightload--and having a similar rated capacity; Inf the -vicinity of one-,half load?V the` Dieselv engine is themost eilicient lof the two. If the Diesel engine can be operated at ghalf speed-by 'rated load `a considerable `m`gaiir'inoperatingeiiciency is cbtainable.`

In Fig. 3 there is illustrated a switch and circuit diagram of connections for shitting the arrangement of the load relative to the generator and therefore the Diesel engine. In said igure 72 indicates a switch of three pole, double throw type with the blades 73 and theinine binding posts 77 -to 85 inclusive. Posts 77 andffStare connectedbyjumper 86 while posts 83, and 79 are connected by jumpers 87 and 88. The generator l2 is a three wirefgenerator which at full load speed delivers 220 volts to the outside lines 38 and 'the neutral line 38a is also provided and the same is connected to the balance coil of the generator and to the'switch at post 78. The

:outsidewf'eed 'wires-38 are connected to the posts 77 :and `75L of theswitch- 72. The= ligliti1ig4loadis :shown connected in Ythree ,wirefcircuit arrangement-and 'is-arranged to be` connectedrto thef supply VlineY as 85 two shunted circuits, or asa. series of circuits-butdivided. When the-Diesel -engine and generator travel lat .halfV speed the voltage deliveredj t0 `the outside lines-38y vis approxiinatelyv 110. When `it travelsatnormal 90 rated speed the voltage deliveredis 220 volts.

In the-.first instancethatwo lighting circuits having three wires -arey connected in parallel to the=outside supply lines 385-v Inthe latter instance the three load wires are connected inv split voltage. relation thereby impressingI substantially. thesame-voltageonr the-two" circuits. The=two outsidelinesofthe lighting lcircuit are indicated bythenumerals 74 and 76 and the middle lineis indicated by themioo numeral.v 475,-' and lines y74, 75 `land 762 are` VVoonnected respectively to the central f binding posts 80,81-and 82 oftheswitch'72;

vSince the two outside lines 38 are connected ancingfline is connected tox posts 7 8; f When the switch 7 3 is thrown-down the neutral wire 38iis employed. When-theswitch is thrown up: thefuse-of the neutral wire-is discontinued.

Infeither instance llOwvolts'is impressedflo acrossvthe'two portionsof the lighting circuits evenirthough-the-voltage inthe supply circuitschangesfrom yto .220 volts.

Lines .Y0-and 71 are connected to theoutside lines38 and said lines constitutek a power cir- 15 cuit andthe'voltage in this circuit will vary accordingy to the voltage/generated, but inaJ power circuitl this is relatively unimportant while in a lighting circuit it is essential that the voltage remain within.aften'percentaange. 20

Theresult ofthe aforesaid arrangement is thatthe Diesel-engine is able tto operate :at half speed vand half load and still supply through the direct connected generator 110 volts',V tothef lighting circuitor supply 110 e125 volts: lat full' speedv andf'full load-.to `the lighting circuit. Y Thef invention. claimed is t In a unitaryl heat and power: system, the

combination with a power.r generating `unit c1130 including a fuel combustion engine having an exhaust conduit, of a hot water heating system including separate water aclets for said engine and the said exhaust conduit, inlet and outlet pipes foi said water aclets, a pipe connection between the two inlet pipes, e pipe connection between the two outlet pipes, a pipe connection between the inlet pipe of one of said jackets and the outlet pipe of the other of said jackets and valves in each of said pipe connections by the manipulation of which t-he water to be heated may be passed through the two jackets in parallel or in series.

In Witness whereof, I have hereunto affixed my signature.

SKILES E. TEST. 

